<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<title>文件预览</title>
</head>
<body style="padding:0px;margin:0px;">
<textarea readonly style="height:100%;width:100%;padding:8px;"><?=$da['content']?></textarea>
</body>
</html>